188338864 has 20 divisors (see below), whose sum is σ = 417036304. Its totient is φ = 80716608.

The previous prime is 188338837. The next prime is 188338877. The reversal of 188338864 is 468833881.

188338864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840687 + ... + 840910.

Almost surely, 2^188338864 is an apocalyptic number.

188338864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

188338864 is an abundant number, since it is smaller than the sum of its proper divisors (228697440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

188338864 is a wasteful number, since it uses less digits than its factorization.

188338864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681612 (or 1681606 counting only the distinct ones).

The product of its digits is 884736, while the sum is 49.

The square root of 188338864 is about 13723.6607361156. The cubic root of 188338864 is about 573.2094155601.

The spelling of 188338864 in words is "one hundred eighty-eight million, three hundred thirty-eight thousand, eight hundred sixty-four".